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|
use strict;
use warnings FATAL => 'all';
use Test::More;
plan skip_all => "Skipping the optimize tests on Win32/cygwin for now."
if ( $^O eq 'MSWin32' || $^O eq 'cygwin' );
use t::common qw( new_fh );
use_ok( 'DBM::Deep' );
my ($fh, $filename) = new_fh();
my $db = DBM::Deep->new(
file => $filename,
autoflush => 1,
);
##
# create some unused space
##
$db->{key1} = "value1";
$db->{key2} = "value2";
$db->{a} = {};
$db->{a}{b} = [];
$db->{a}{c} = 'value2';
my $b = $db->{a}->{b};
$b->[0] = 1;
$b->[1] = 2;
$b->[2] = {};
$b->[2]->{c} = [];
my $c = $b->[2]->{c};
$c->[0] = 'd';
$c->[1] = {};
$c->[1]->{e} = 'f';
undef $c;
undef $b;
delete $db->{key2};
delete $db->{a}{b};
##
# take byte count readings before, and after optimize
##
my $before = (stat($filename))[7];
my $result = $db->optimize();
my $after = (stat($filename))[7];
ok( $result, "optimize succeeded" );
cmp_ok( $after, '<', $before, "file size has shrunk" ); # make sure file shrunk
is( $db->{key1}, 'value1', "key1's value is still there after optimize" );
is( $db->{a}{c}, 'value2', "key2's value is still there after optimize" );
$db->_get_self->_engine->storage->close( $db->_get_self );
##
# now for the tricky one -- try to store a new key while file is being
# optimized and locked by another process. filehandle should be invalidated,
# and automatically re-opened transparently. Cannot test on Win32, due to
# problems with fork()ing, flock()ing, etc. Win32 very bad.
##
SKIP: {
skip "Fork tests skipped until fh/filename question solved.", 4;
skip "Fork tests skipped on Win32", 4
if $^O eq 'MSWin32' || $^O eq 'cygwin';
##
# first things first, get us about 1000 keys so the optimize() will take
# at least a few seconds on any machine, and re-open db with locking
##
for (1..1000) { $db->STORE( $_, $_ +1 ); }
undef $db;
##
# now, fork a process for the optimize()
##
my $pid = fork();
unless ( $pid ) {
# child fork
# re-open db
$db = DBM::Deep->new(
file => $filename,
autoflush => 1,
locking => 1
);
# optimize and exit
$db->optimize();
exit( 0 );
}
# parent fork
ok( defined($pid), "fork was successful" ); # make sure fork was successful
# re-open db
$db = DBM::Deep->new(
file => $filename,
autoflush => 1,
locking => 1
);
# sleep for 1 second to make sure optimize() is running in the other fork
sleep(1);
# now, try to get a lock and store a key
$db->{parentfork} = "hello";
# see if it was stored successfully
is( $db->{parentfork}, "hello", "stored key while optimize took place" );
undef $db;
$db = DBM::Deep->new(
file => $filename,
autoflush => 1,
locking => 1
);
# now check some existing values from before
is( $db->{key1}, 'value1', "key1's value is still there after optimize" );
is( $db->{a}{c}, 'value2', "key2's value is still there after optimize" );
}
done_testing;
|
